Detections
Analytics

Citrix XenServer QEMU ioport Array Overflow Guest-to-Host Privilege Escalation (CTX219136)

high Nessus Plugin ID 95659

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Synopsis

The remote host is affected by a privilege escalation vulnerability.

Description

The version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by a privilege escalation vulnerability in the QEMU ioport component due to an array overflow that is triggered during the handling of addresses in ioport read and write look-ups. A local administrative user on the guest system can exploit this issue to gain elevated privileges on the host system.

Solution

Apply the appropriate hotfix according to the vendor advisory.

See Also

https://support.citrix.com/article/CTX219136

Plugin Details

Severity: High

ID: 95659

File Name: citrix_xenserver_CTX219136.nasl

Version: 1.8

Type: local

Family: Misc.

Published: 12/9/2016

Updated: 11/13/2019

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: Low

Base Score: 3.7

Temporal Score: 2.7

Vector: CVSS2#AV:L/AC:H/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2016-9637

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:citrix:xenserver

Required KB Items: Host/local_checks_enabled, Host/XenServer/version

Exploit Ease: No known exploits are available

Patch Publication Date: 12/6/2016

Vulnerability Publication Date: 12/6/2016

Reference Information

CVE: CVE-2016-9637

BID: 93970